This book highlights different domains of functional polymers from membranes and coatings to composite materials. It includes their synthesis routes and techniques, characterization, properties, and applications. The book also provides the basics and advances about different functional polymers and composites with an up-to-date progress in the field of research and their application on a domestic and industrial scale. The main topics to be covered include polymeric membranes, paints and coatings, smart polymers, self-healing elastomers, biodegradable polymers, food packaging, and functional composite materials.